Legio I Flavia Gallicana Constantia

Legio I Flavia Gallicana Constantia: one of the legions of the later Roman empire. Its name means "the reliable Flavian legion from Gaul".

Constantius I Chlorus

This legion is mentioned in the late-antique text known as Notitia Dignitatum as one of the units belonging to the field army that was stationed in Gaul. The name suggests that it was founded by Constantius I Chlorus (r.293-306), who belonged to the Flavian family, and it has been assumed that the first assignment of this unit was to protect Armorican coast.